operator==(std::ranges::take_view::sentinel<Const>)
operator==( const std::counted_iterator <ranges::iterator_t <Base>>& y,
requires std::sentinel_for <ranges::sentinel_t <Base>,
ranges::iterator_t </*add-const-if*/<OtherC, V>>>
friend constexpr bool
operator==( const std::counted_iterator <
ranges::iterator_t </*add-const-if*/<OtherC, V>>>& y,
Compares a take_view::/*sentinel*/ with a std::counted_iterator (typically obtained from a call to take_view::begin).
Returns true if y points past the Nth element (where N is the number passed to the constructor of take_view), or if end of underlying view is reached.
The exposition-only alias template /*add-const-if*/ is defined as
template<bool C, class T>
using /*add-const-if*/ = std::conditional_t <C, const T, T>;.
These functions are not visible to ordinary unqualified or qualified lookup, and can only be found by argument-dependent lookup when std::ranges::take_view::sentinel<Const> is an associated class of the arguments.
The != operator is synthesized from operator==.
[edit] Parameters
[edit] Return value
y.count() == 0 || y.base() == x.end_, where end_ denotes the underlying sentinel.
[edit] Example
Reason: no example
[edit] Defect reports
The following behavior-changing defect reports were applied retroactively to previously published C++ standards.
| DR | Applied to | Behavior as published | Correct behavior |
|---|---|---|---|
| LWG 3449 | C++20 | comparison between the iterator and the sentinel of differently const-qualified take_view was unsupported
|
made supported when possible |